Detachable handle for drills



April 24, 1928.

1,667,280 F. H. BLANDING DETACHABLE HANDLE FOR DRILLS Filed July 10, 1924 2 Sheets-Sheet 1 l/V VE N TOR g Forresf fl. [Fla/707279 H aykArro//vf Patented Apr. 24, 1928.

UNITED STATES PATENT OFFICE.

FORREST H. BLANDING, OF DETROIT, ItIICHIGAN, ASSIGNOR TO CHICAGO PNEUMATIC TOOL COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

DETACHABLE HANDLE FOR DRILLS.

Application filed .l'uly 1( This invention relates to handles for percussive tools of the type used in development work for drilling. It is particularly concerned with tools of this kind which are mounted upon some kind of a support, as a cradle or shell, and advanced mechanically to the work as by means of the ordinary feed screw.

A principal object of the invention is to provide a handle device which can be readilyapplied to the .cylinder of a drifter"or shell mounted drill to adapt the latter for use as a manually supported .sinker drill. Another object is to provide the device with resilient means for relieving the operator of shocks incident to the operation of the drill when used as a hand supported tool. Another object is to increase the .scope of utility of the mounted type of drill. A further object is to provide a device fitting and readily mounted on the shell mounting and feeding portions of the drill and disposing a handle in line with the longitudinal airis of the drill. Other objects will be apparent from the detailed description-which follows.

in order to illustrate the invention and the manner of its use, one concrete embodiment thereof, at present considered the pret'crred form of the invention, is shown in the accompanying drawings, in which:

Fig. 1 is a side elevational view of the handle device secured to a percussive drill of the cradle or shell type; i

Fig. 2 is a right end elevational view of the parts shown in Fig. 1;

Fig. 3 is a sectional view on the line 33 of Fig. 2; and' Fig. xis a bottom plan view of the parts shown in Fig. 1. y

The embodiment of the invention chosen for the purpose of illustration comprises in its essential features a. member or block 5 arranged to be secured to the percussive drill A which as shown. is of the pressure fluid type having portions secured to or integral with the drill cylinder for cooperation with a shell mounting (not shown), such as the wings a. and the feed nut a, and a handle 6 resiliently mounted on member 5 to permit the drill lo be inanually supported. The member or block 5 may be constructed and arranged to cooperate with the wings .a and feed nut a for which purpose block 5 has side portions provided with grooves 7 slidably receiving the wings a and an end plate 1924. Serial No. 725,315.

8 forming an abutment for the'feed nut (Fig. 3). The end plate has a perforation 9 in line with the bore of the feedv n ut a and through this perforation and the bore of the feed nut extends a bolt .10, the head,

of which with its washer lle'ngag'es the end of the feed nut aoppoSite u) that engaged byplate 8, a lock washer 12 and nut/13 serving to clamp plate 8 against the end'of the lock nuta whereby theblock 5 is securely and immovably clamped to drill A.

In order to resiliently mount handle (3 upon block 5, the latter may be provided with spaced aligned perforations, in the present instance formed in spaced pairs of perforated cars 14 lprojecting outwardly from those parts of block 5 having grooves 7. vThrough these perforations extend for sliding movement one or more rods 15, in

-the present instance two, having bent ends 16 to which handle 6 is secured, these bent ends serving to dispose the handle in line with the longitudinal axis orjcenter line of the drill, as clearly illustratedin Figs. 1 and 2. Sliding mox ement ofrods within the perforations of cars 1=t 'is yieldingly limited by coil springs 17 encircling the rods 1:) on opposite sides of block 5. the spring 17 at the right of Fig. 1 being confined between the adjacent ear l and a stop 18 on the rod adjacent its bent end 16 and the spring 17 at the left of Fig. 1 being confined between its adjacent ear 14 and an abutment washer 19 backed by a nut 20 threaded on the end of rod 15. This construction permits limited yielding movement of the supporting rods 15 of handle 6 relative to block 5 and drill A axially in both directions and thus relieves the operator of shocks incident to the use and operation of the drill.

The handle may consistof a transversely disposed handle bolt 21 extending through perforations in the bent ends 16 of rods 15 and encircled by cylindrical members 220i suitable material, such as rubber, forming grips and lined with steel tubes'23 which serve as spacers between the rod end 16 and the handle rodabutment washers 24 backed at one end by the head 25 of. the bolt and at the other by lock washer 26 and nut 27.

In using the handle device the drill is detached from its shell mounting, the block 5 disposed with grooves 7 in line with wings a, whereupon the block is slid longitudinally of the drill until abutment plate-8 engage-s ill the end of the feed iiiit (11', Thelio lt It) is then passed 1-1rbug1r"t11e liore (if the feed nut until its threaded end extends through the hole in plate 8, the lock washer 12 and nut 13- heirfg then applied and the latter set up securely to fasten the block 5 to the drill. The latter is then really for use as :1 hand supported tool, T9 recomgert the drill to the mounted type tli nti'oveproceis's is reversed. 7

Froin the above it will he nppareit that the handle device (ilft'lre'present invention adapts the. cradle or shell type of 'drill used in drifting to use 551 manually siipport ed drill such .asfis used for sinking-thusreducmg theamoi iit (if nient needed drillingepera ti iis andhr de iing the seiope of utility of a drill (stu s clniim ctere tlll t the ha i dle defied i=3 t l Sid) atta c-hetl and (letaehed soflthat tlie drill.cziii be quickly converted fron sl iell iiio igited to, hand supported use and rice. \-e'r sa', that the resilient mounting of the'handle, redut'es thesho ek andstrain incurred liy the opei'ntor in using a iheauy d i ill as a hand supported tOQIl and that the handle device is simple in (grits-( 1 nction, easy "arid cheap to manufacture.land has no complicated or ldelitfii'te parts which render it subjeet to" lir'ealiage or ii terfere with its quick attachment and; de'tfieliiiieirt.

,VVhile but one form ofthej'mfehtion hns been herein shown descrilmdjt ,is to lie uinlerstodd{tl1at the inve'htionfis not limited to the specific, features,gf censtijuetionshown but covers all modified-mu lak'hipt ations and ehan'ges within the scope'ofthe appended claims.

I claim: 1. The'co or shell mounted type and: a handledevice detachably secured to the drill comprising a block having" grooves receiving the pr0- j eetii lg poetidiis .of the cradle 0r shell engiiginglparts of the drill with a slidiijig (it and applicable to. and removable from the drill \i itllqtit. .disassemhly of the latter, means for securing the block to the drill, and a handle attached t said'lilOck to adapt the drill for use as n liiaiinillly supported tool. ,7

2. ,The CQill llIlfltlOl} of a drill Oft-heeijitd le or shell mounted type, and; .aYl-iandlejde ice dtachzihly secured to tl1e dr-ill comprising aibloclxt hayinggmoves reqeirin; the p t-( jeeting portions eftlre cradle. er shell engaging parts of the drill wither} slidlng l'it, nieans utilizing the/teed nut projection of the drill for securing sai d; block upon the drill. 11mm handle'attached to said block to zidrphthe drill for use as a manually U" 1 Y l' w 3. .The eblifljiiititiqn' t drill; the ei-adl or: shelll ne iggited type'a-inla hand c'cev re dem aab ge micgii the drill .(OL-J l a l)l0:'l( having grooves receiving the pro ',l iiiiatio1i ofiadrillo f the. cradle jeeting portions of the ciligtlleqr-sliell enga ging'parts With'a slidihg'fit, nieanssecnring said block against movement on the drill, and a handle'attaehed to said-bloek-toadapt the drill for use as a manually supported tool.

4. The'comlihh tion of a drill 0f the cradle orshell nounted type and a handle device detac'habfy secured to the drill comprising a block having grooves r.' cei\'in 1 the .pro-

5. Tia icbsibsmucn'efzrarinof u munor shell mounted type' a l ahdl'e' device d etachahly tCllfIl 't'o the 'il'l "cramp-151's; a block having re'eess s ie'cei i'i'd tlie projecting' peit'io iisof't'lie tfiiclle' "or s iell an; parts, 'sz'iid'l block liz'hfii'r'ga rm;- tlje'f'eedl'r'nit prjectic'nif Gf'the (ii-in, a bolt' exten'difi 'uirmigt tlie"bore' ore-rid rojeetitm :i'ndan aligned. fibre insit itl plate to secure said hl'oe'kt'ot'he .diillf spaced {iaral'lel rods slidiibly 'me fir'eu oh said Inst-2k for limited yielding.'frnoi eiiient in liolh directions, said rods'ljeing'inwardly herit at one endg' and a'trari sveise.hziiidle ge'ci' i ed to the bent endsvot the redsihd dis o sed thi-rehy above and in'line witli' the ar'ia'l center of the di ill. H

6. The committees 0rd drill 'Qf'the cradle or shell moiihted'typeahcl a' handle device detachably SeC uredto the drill 'e-dmprising a member emdvably seeureid: to the drill; pertorat'ed ears' on said i'fieinli eri a rod sli clahly received in the perforations of said cars, springs encireling saidrod yi'eldiz'igly to limit sliding nioitihntYbf said r'od rclhtire to said member. ahd 'q ha'nd'le on' s t 'id rod to permit the drill tobel intihuitlli stippoited.

7. Thepombination, of a dril'lhf the cradle or shell indtnitd' type and han'dlei defies detzurhnhly seenred to the (lii f hmpi is'ihg (it the drill, perfot a t-ed ears dnfsaldlinenibeiu spurred rodspili'iiillel with euch 'bth'e'r find with the nx is of the'drifll slidalil'e in tlie p'ee ftfll'ifltl of saide'ars,iesilienttheahs f'or limdin the sliding mov'ein'eilt,ofsaiil rods. hfnd a handle semi-5d to said rods to permit the drill to be nhnua'lly supported 8, The r'nbi atibti' of a' drill hf the eradle oi-shell Itihuhted type and a handle (10- lviee clt'aeli'ahly to the drill coinprising} memherreniqyably' secured to the cylinder p'erfdr ated ears'tin said meiriher, spzied' i'fddsfl pi i'zill'el with each other and withthe axis'oftlie drllls lid'iilile in tlie 'pei'forating of isa id em, resilient plate iii-iii:

means for limiting the sliding movement of said rods, and a handle secured to said rods to permit the drill to be manually supported, said rods having their handle ends inwardly bent to dispose the handle substantially in line With the axis of the drill.

9. A handle attachment for percussive drills of the cradle or shell mounted type comprising a block having grooves arranged to receive the projecting portions of the cradle or shell engaging parts of the drill with a sliding fit, means including a bolt arranged to engage the feed nut projection of the drill to secure the block upon a drill, and a handle attached to said block.

10.A handle attachment for percussive drills of the cradle or shell mounted type comprising a block having grooves ar ranged to receive the projecting portions of the cradle or shell engaging parts of the drill with a sliding tit and applicable to and removable from the drill without disassembling the latter, said block having an abutment portion disposed in the plane of the feed nut projection of the drill, means supported by said abutment portion for securing the block to the feed nut projection of the drill, and a handle secured to said block.

11. A handle attachment for percussive drills of the cradle or shell mounted type comprising a block arranged to be removably secured to the drill, pairs of aligned perforated ears on said block, rods extending through the perforations in said ears. said rods having similarly bent perforated ends, and a bolt provided with spacing grips extending through the perforated ends of said rods to form a handle.

12. A handle attachment for percussive drills of the cradle or shell mounted type comprising a member having recesses slidingly receiving the wing projections of the cradle mounting portion of the drill. an abutment to engage the feed nut of the drill, means to clamp said member to the engaged portion of the drill, and a spring handle secured to said member.

13. A handle attachment for percussive drills of the cradle or shell mounted type comprising a block having parts arranged slidlngly to fit the cradle mounting portions of the drill, a perforated abutment plate to engage the feed nut, a bolt fitting the perforation in said plate arranged to extend through the bore of the feed nut of the drill to clamp said block thereto, and a spring handle secured to said member.

14. A handle attachment for percussive drills of the cradle or shell mounted type comprising a block having parts arranged slidingly to fit the cradle mounting portions of the drill, a perforated abutment plate to engage the feed nut, a bolt fitting the perforation in said plate arranged to extend through the bore of the feed nut of the drill to clamp said block thereto, and a handle resiliently mounted on said block extending rearwardly therefrom and offset relative thereto to dispose the same in line with the axis of the drill.

15. A handle attachment for percussive drills of the cradle or shell mounted type comprising a block having parts arranged slidingly to fit the cradle mounting portions of the drill, a perforated abutment plate to engage the feed nut, a bolt fitting the perforation in said plate arranged to extend through the bore of the feed nut of the drill to clamp said block thereto, said block having aligned perforations, slidable means (:0- operating With said perforations, resilient means associated with said slidable means yieldingly to limit the movement thereof, and a handle carried by said slidable means and disposed offset from said block to be in line with the longitudinal axis of the drill. Signed by me at Detroit, Michigan this 7 day of July 1924.

FORREST H. BLANDING. 

